Hi Panfrost and OPP Maintainers, On Sat, 11 Apr 2020 at 22:06, Clément Péron <peron.clem@xxxxxxxxx> wrote: > > OPP table can defined both frequency and voltage. > > Register the mali regulator if it exist. After this patch, Panfrost update properly both voltage and frequency. But the GPU is still not properly down-clocked when temperature is high. I try to add a cooling map like this : https://github.com/clementperon/linux/commit/955961c7c035abbf44e74f608fe8f059c06a2fbe But got the following error: [ 2.712082] panfrost 1800000.gpu: [drm:panfrost_devfreq_init [panfrost]] Failed to register cooling device Do you see what I'm missing? Thanks for your help, Clement > > Signed-off-by: Clément Péron <peron.clem@xxxxxxxxx> > --- > drivers/gpu/drm/panfrost/panfrost_devfreq.c | 34 ++++++++++++++++++--- > drivers/gpu/drm/panfrost/panfrost_device.h | 1 + > 2 files changed, 31 insertions(+), 4 deletions(-) > > diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c > index 62541f4edd81..2dc8e2355358 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c > +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c > @@ -78,12 +78,26 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) > struct device *dev = &pfdev->pdev->dev; > struct devfreq *devfreq; > struct thermal_cooling_device *cooling; > + const char *mali = "mali"; > + struct opp_table *opp_table = NULL; > + > + /* Regulator is optional */ > + opp_table = dev_pm_opp_set_regulators(dev, &mali, 1); > + if (IS_ERR(opp_table)) { > + ret = PTR_ERR(opp_table); > + if (ret != -ENODEV) { > + DRM_DEV_ERROR(dev, "Failed to set regulator: %d\n", ret); > + return ret; > + } > + } > + pfdev->devfreq.opp_table = opp_table; > > ret = dev_pm_opp_of_add_table(dev); > - if (ret == -ENODEV) /* Optional, continue without devfreq */ > - return 0; > - else if (ret) > - return ret; > + if (ret) { > + if (ret == -ENODEV) /* Optional, continue without devfreq */ > + ret = 0; > + goto err_opp_reg; > + } > > panfrost_devfreq_reset(pfdev); > > @@ -119,6 +133,12 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) > err_opp: > dev_pm_opp_of_remove_table(dev); > > +err_opp_reg: > + if (pfdev->devfreq.opp_table) { > + dev_pm_opp_put_regulators(pfdev->devfreq.opp_table); > + pfdev->devfreq.opp_table = NULL; > + } > + > return ret; > } > > @@ -126,7 +146,13 @@ void panfrost_devfreq_fini(struct panfrost_device *pfdev) > { > if (pfdev->devfreq.cooling) > devfreq_cooling_unregister(pfdev->devfreq.cooling); > + > dev_pm_opp_of_remove_table(&pfdev->pdev->dev); > + > + if (pfdev->devfreq.opp_table) { > + dev_pm_opp_put_regulators(pfdev->devfreq.opp_table); > + pfdev->devfreq.opp_table = NULL; > + } > } > > void panfrost_devfreq_resume(struct panfrost_device *pfdev) > diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h > index 06713811b92c..f6b0c779dfe5 100644 > --- a/drivers/gpu/drm/panfrost/panfrost_device.h > +++ b/drivers/gpu/drm/panfrost/panfrost_device.h > @@ -86,6 +86,7 @@ struct panfrost_device { > struct { > struct devfreq *devfreq; > struct thermal_cooling_device *cooling; > + struct opp_table *opp_table; > ktime_t busy_time; > ktime_t idle_time; > ktime_t time_last_update; > -- > 2.20.1 > _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
